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Abstract

The methods have been developed to determine the protection potential against pitting corrosion. They are based on the theory that the pitting protection potential(Ep) is actually the transition potential of the direction of current between the occluded cell and the external surface (ET).ET lasts from -220 mV to -440 mV(SCE), the lowest of which can be considered as cathode protection potential. The Ep values determined with cyclic potentiodynamic polarization method is included in the ET with above methods.

Keywords

Partial corrosion, Transition potential, Occluded cell, Protection potential.

Publication Date

1999-05-28

Online Available Date

1999-05-28

Revised Date

1999-05-28

Received Date

1999-05-28

References

1左景伊.应力腐蚀破裂.西安:西安交通大学出版社,1985.1~822刘幼平.局部腐蚀的保护电位与闭塞电池间的内在关系.北京化工大学学报,1996,(23)2:66~723杨武,顾睿祥,黎樵焱等.金属的局部腐蚀.北京:化学工业出版社,1995.1094刘幼平,夏念勇,赵旭辉.孔蚀保护电位剖析.中国腐蚀与防护学报,1997,(17)4:241~2475吴荫顺.金属腐蚀研究方法.北京:冶金工业出版社,1993.11

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